If you notice, the aircraft is painted Tactical Grey, the purpose of which is to subdue the aircraft in both daylight and nighttime...if you missed a part or two, you risk creating a contrast point, thus making you visible

It seems like many USAF aircraft became Tactical Grey around the time of Desert Storm, and never went back Before that, stateside (non-fighter) aircraft tended to wear the classical USAF colors-light grey on the bottom, white on top, yellow cheat line, with the stars and bars in color (and all paint was glossy). Aircraft stationed in Europe tended to get green camoflage, and sometimes stateside transports would get camo schemes for war game exercises.

I was watching a Discovery program on this, and an AirForce guy came on and said the most appropriate color to subdue the aircraft is a strange pink-peach color. But he laughed and said it probably wouldn't look that great.